/Engine/Source/Editor/BlueprintGraph/Classes/K2Node_GetClassDefaults.h
Finds and returns the class input pin.
[UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * FindClassPin ( const [TArray](API\Runtime\Core\Containers\TArray)< [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * > & FromPins ) const